Go to the /r/incels and /r/truecels subs. Ask them "Why not go a prostitute?" They'll tell you that they feel going to a prostitute is too humiliating or that they don't want to pay for sex or that they're looking for love.

The same logic applies to sexbots. People who think sexbots will have any important effect on dating life are probably the same who thought porn would bring the end of the world, back when porn became popular. It's not about the sex, it's about the validation.